The historically aware say that chicken tikka masala was invented in England, that it's not an Indian dish by a long shot. Who am I to argue with history?*
My buddy Jang-woong's wife gave me a packet of masala paste,** so I whipped this up last night and reheated it today for lunch. Not bad.
*Did you catch the Trek reference? (Although Dr. Who apparently said it, too.)
**Indians are much more likely to refer to their complex spice mixes as some sort of masala. The term "curry"—referring to the pungent spice blend with which Westerners are familiar—is used primarily in non-Indian countries, and not by Indians themselves. The etymology of "curry" is somewhat confused. See here. More here.